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https://github.com/morluto/rea.git
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morluto
a7f50e3386
Share ELF note headers across note inspection, Flutter build IDs, Node SEA, and recorded-crash source binding. Decode REL/RELA records once for MIPS shared-load analysis and IL2CPP linking, removing superseded scalar helpers. Share the CLR header prefix between desktop detection and managed PE parsing while preserving their distinct read bounds and admission policies. Cover those differences and ignored R_NONE fields with production-boundary tests. Validation: 493 focused tests passed, two existing skips; static checks and test discovery passed. Public managed/desktop CLI and ELF notes CLI/MCP workflows exercised; no real external analysis providers were run.
34 lines
1.1 KiB
TypeScript
34 lines
1.1 KiB
TypeScript
import { err, ok } from "../result.js";
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/** ELF note padding follows binutils: only a declared alignment of 8 uses 8. */
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export const elfNoteAlignment = (declared: number | bigint): number =>
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declared === 8 || declared === 8n ? 8 : 4;
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/** Descriptor and next-note offsets relative to the note's 12-byte header. */
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export const elfNoteLayout = (
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namesz: number,
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descsz: number,
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alignment: number,
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) => {
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const descriptor = Math.ceil((12 + namesz) / alignment) * alignment;
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return {
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descriptor,
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next: Math.ceil((descriptor + descsz) / alignment) * alignment,
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};
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};
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/** Fixed ELF note words; padding, owner names and descriptor admission belong to consumers. */
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export const readElfNoteHeader = (bytes: Uint8Array, littleEndian: boolean) => {
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if (bytes.byteLength < 12)
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return err({
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kind: "malformed" as const,
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message: "ELF note header is truncated",
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});
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const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
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return ok({
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namesz: view.getUint32(0, littleEndian),
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descsz: view.getUint32(4, littleEndian),
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type: view.getUint32(8, littleEndian),
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});
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};
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